Feed-screw mechanism.



' L. c. BA YLES. FEED SCREW MECHANISM.

- A f 4f\ F4 I? J 7 fiZZnew UNITED STATES PATENT OFFICE.

LEWIS G. BAYLI IS, F d'OHANNESBURG, TRANSVAAL, ASSIGNOR '10 INGEBSOIiL-BAND COMPANY, OF NEW YORK, N. Y. A CORPORATION OF NEW JERsEY.

FEED-SCREW MECHANISM.

ama or Letters Patent.

Patented May 31, 1910.

Application filed. October 28, 1909. Serial No. 525,001.

To all whom it may concern:

Be it known that I, LEWIS o. n mja citizen of the United States, and resident Screw Mechanism, of which the following is a specification.

This invention relates to certain improvements in feed screw mechanism and has for its object to provide very simple and effective means for taking up the wear between the feed screw and the parts being fed thereby and thereby preventing lost motion between the screw and the said parts.

This invention is particularly well adapted for use in connection with rock drilling machines.

In the accompanyin drawings, Figure 1 represents a portion 0 a feed screw in side elevation, the parts which coact therewith being shown in longitudinal central section, Fig. 2 is a detail view in end elevation, the feed screw beingshown' in section, Fig. 3 is a transverse section taken in the plane of the line A-A of Fig. 1, looking in the direction of the arrows, and Fig. 4 is a transverse section taken in the plane of the line BB' of Fig. 1, looking in the direction of the arrows.

The feed screwfis denoted by 1 and the cylinder or other body which it 1s adapted to 'move is denoted by 2. This body 2 1s rovided with a hole through which the eed screw extends, the walls of the hole being spaced a sufficient distance from the screw to permit the insertion. of a sleeve, which sleeve is divided longitudinally to form a stationary member 3 and an adjustable member 4.

Both the stationary and adjustable members have a screw threaded engagement with the feed screw 1.

The stationary member is provided intermediate its ends with a semi-cylindrical flange forming a shoulder 5, which shoulder is located within a recess 6 surroundin the hole through the body 2 at one end 0 said hole. The exterior of this stationary member 3 of the sleeve is of plain cylindrical form upon both sides of the flange which forms the shoulder 5.

The adjustable member 4 of the longitu-- dinally divided sleeve is provided at one end thereof, exterior to the body 2, with a head forming a shoulder 7. The other end of this adjustable member is exteriorly screw threaded as shown at 8.

A look nut 9 surrounds the plain semicylindrical end of the stationary member 3 and the screw threaded semi-cylindrical end of the adjustable member 4 exterior to the body 2, which nut serves to draw the adjustable member 4 inwardly toward the stationary member 3 of the sleeve when the said nut is screwed home.

In actual practice, one or more removableis desired to take up this wear, it can be accomplished by removin one of the washers 10 and then screwing t e lock nut 9 home thus drawing the adjustable member 4 of the sleeve toward the stationary member 3 thereof.

What I claim is 1. A feed screw, a sleeve divided longitudinally to form stationary and adjustable members both having a screw threaded engagement with said screw, said members having oppositely arranged shoulders, a body interposed between said shoulders and a nut havin a screw threaded engagement with the ad ustable member for drawing it toward the stationary member to take up wear on the screw.

2. A feed screw, a sleeve divided longitudinally to form stationary and adjustable members both having a screw threaded engagement with said screw, said members aving oppositely arranged shoulders, a body interposed between said shoulders, a nut having a screw threaded engagement with the adjustable member for drawing. it toward the stationary memberto take up wear on the screw, and one or more removable washers interposed between the said body and the shoulder on the adjustable member.

3. A feed screw, a sleeve divided longitudinally to form stationary and adjustable members both having a threaded engagement with said screw, said members having oppositely arranged shoulders, a

body interposed between said shoulders, the V In testimony, that I claim the foregoing 10 stationary member having a plain semias my invention, I have signed my name in cylindrical portion and the adjustable mempresence of. two witnesses, this twentyber a screw thrfiadledd semidcylindrical pogseventh day of October 1909.

tion exterior to t e 0 an a nut surroun ing said end and engaging the screw thread- LEWIS BAYLES' ed portion on the adjustable member for Witnesses:

drawing the same toward the stationary F. GEORGE BARRY,

member. C. S. SUNDGREN. 

